Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh trang » thanh trung, canh tranh, hanh trinh
luan nhung » luan chung, luan hung, quan nhung
nhung cong » dung cong, thong cong, hang cong
hanh tang » anh tang, hanh mang, hanh tung
toan tap » toan ban
cong ha » cong hoa, dong ha, cong tac
ha toan » hoa toan, ha tran, va toan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chieu tinh)) - ((hanh tang) OR (hanh trang)) luan nhung cong ha toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu tinh)) - ((hanh tang) OR (hanh trang)) luan nhung cong ha toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chieu tinh)) - ((hanh tang) OR (hanh trang)) luan nhung cong ha toan tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chieu tinh)) - ((hanh tang) OR (hanh trang)) luan nhung cong ha toan tap*.